It sounds as if she's overtired - at her age she should be sleeping approximately 15-17 hours per day. Sleep begets sleep and, unfortunately, the opposite is also true. The less she sleeps, the more tired she is, the harder it is for her to fall asleep. It's a vicious cycle.
Have you checked out
Tracy's sleep interview yet? There is a lot of great information in there that should help you come up with a plan of how to get your baby to sleep again.
Oh, and to answer your original question, it's very possible for a growth spurt to throw everything off, even at that early age.
HTH!